Successfully complete the indicated task to unlock the corresponding achievement. To view your achievements and stats in Steam, select "Community", "My profile", "View all my games", then the game and view stats.

...Not Nearly Big Enough: Perfect the Prime Guardian boss fight.

...Not Nearly Long Enough: Perfect the Carrion boss fight.

...Should've Brought a Friend!: Beat Carrion with both Ares and Tarus.

99 Problems but a Hit Ain't One: Achieve 99 attack combo.

And Don't Come Back!: Perfect the Goliath boss fight.

Another Story: Finish the game with Tarus.

Armored Saint: Find the drone repair bay.

Behold! My True Strength!: Achieve character level '5'.

Bookworm: Collect all the Data cubes.

Break the Shell: Beat Zypher Pod with Ares.

Bursting with Energy: Destroy 5 or more enemies, at once with Solar Strike.